Even in the summery abandon that comes with an international football tournament, there’s apprehension about large crowds in high-profile venues. The combination of more frequent terrorist attacks elsewhere and the large-scale sexual assaults in Cologne last New Year’s Eve have made many people nervous about public celebration. But Berlin’s Fanmeile (“fan-mile”) has become an institution in the German capital since it was inaugurated for the home World Cup in 2006. And people don’t like giving up their institutions.